tests/plaintextnames: add TestInoReuseEvil

This commit is contained in:
Jakob Unterwurzacher 2020-09-12 17:54:55 +02:00
parent db61ec5115
commit 6a9c49e9cf

View File

@ -3,8 +3,10 @@ package plaintextnames
// integration tests that target plaintextnames specifically
import (
"fmt"
"io/ioutil"
"os"
"syscall"
"testing"
"github.com/rfjakob/gocryptfs/internal/configfile"
@ -84,3 +86,42 @@ func TestFiltered(t *testing.T) {
fd.Close()
}
}
// TestInoReuseEvil makes it appear that a directory and a file share the
// same inode number.
// Only works on filesystems that recycle inode numbers (ext4 does),
// and then the test causes a hang with these messages:
//
// go-fuse: blocked for 5 seconds waiting for FORGET on i4329366
// go-fuse: blocked for 11 seconds waiting for FORGET on i4329366
// go-fuse: blocked for 17 seconds waiting for FORGET on i4329366
// [...]
//
func TestInoReuseEvil(t *testing.T) {
t.Skip("TODO: enable this test once the problem is fixed in go-fuse")
for i := 0; i < 2; i++ {
n := fmt.Sprintf("%s.%d", t.Name(), i)
pPath := pDir + "/" + n
cPath := cDir + "/" + n
if err := syscall.Mkdir(pPath, 0700); err != nil {
t.Fatal(err)
}
var st syscall.Stat_t
syscall.Stat(pPath, &st)
t.Logf("dir ino = %d", st.Ino)
// delete the dir "behind our back"
if err := syscall.Rmdir(cPath); err != nil {
t.Fatal(err)
}
// create a new file that will likely get the same inode number
pPath2 := pPath + "2"
fd, err := syscall.Creat(pPath2, 0600)
if err != nil {
t.Fatal(err)
}
defer syscall.Close(fd)
syscall.Fstat(fd, &st)
t.Logf("file ino = %d", st.Ino)
}
}